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A moo box. The moo box or moo can is a toy or a souvenir, also used as a hearing test.When turned upside down, it produces a noise that resembles the mooing of a cow.The toy can be configured to create other animal sounds such as the meow of a cat, the chirp of a bird, or the bleat of a sheep.
The size of the circle is dependent on the size of the test article. Generally, a circle 12 feet (3.7 m) in diameter larger and 4 feet (1.2 m) taller than the test article is required. The arrangement should avoid symmetry to reduce the potential for adverse coupling of plane waves. The test article can be mounted on a platform or suspended.
Upsweep is an unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays. This sound was present when the Pacific Marine Environmental Laboratory began recording its sound surveillance system, SOSUS, in August 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds in duration each.
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Analysis of sound and acoustics plays a role in such engineering tasks as product design, production test, machine performance, and process control. For instance, product design can require modification of sound level or noise for compliance with standards from ANSI, IEC, and ISO. The work might also involve design fine-tuning to meet market ...
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In sample recording, digital clicks occur when the signal levels of two adjacent audio sections do not match. The abrupt change in gain can be perceived as a click. [5] In electronic music, clicks are used as a musical element, particularly in glitch and noise music, for example in the Clicks & Cuts Series (2000–2010). [6] [7]
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